Changes

{{Taxonomy

{{Taxonomy

|name=Narwhal

|name="Narwhal

|image=05MSEL012 narwhals breachHR.jpg

|image=05MSEL012" narwhals breachHR.jpg

|caption=

|caption=

|superkingdom=

|superkingdom=

|subgenus=

|subgenus=

|species=

|species=

|binomialname=Monodon monoceros

|binomialname="Monodon" monoceros

|sub=

|sub=

|alt=

|alt=

While most mammalian teeth are softer on the inside and harder on the outside, narwhal tusk appears to be made “inside out,” says Eichmiller. The researchers believe the softer outer layers of the tusk may act like a shock absorber to help prevent breaks. <ref>http://www.nist.gov/public_affairs/techbeat/tb2005_1222.htm</ref>

While most mammalian teeth are softer on the inside and harder on the outside, narwhal tusk appears to be made “inside out,” says Eichmiller. The researchers believe the softer outer layers of the tusk may act like a shock absorber to help prevent breaks. <ref>http://www.nist.gov/public_affairs/techbeat/tb2005_1222.htm</ref>

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!colspan=2 style="width: 100%; text-align: center; background-color: #000088; color: white; "|'''Copyright Details'''

source= [http://oceanexplorer.noaa.gov/explorations/06arctic/background/biology/biology.html]

|style=" background-color: none;"| <small>This work is in the [[Public Domain]] in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the U.S. Code</small>

!style=" background-color: #000088; color:white;"|Source:

|style="background-color: none;border-top: 2px solid black"| <small>File available from the {{{1|[[United States Federal Government]] [http://oceanexplorer.noaa.gov/explorations/06arctic/background/biology/biology.html]</small>}}}.

==References==

==References==